I have a 2011 Silverado with installed towing package. I bought a brake controller but I can't find the connector that fits the plug under the dash. Any suggestions ?

 

If it's like the 2008, which I can't see why it isn't, it is not a connector. rather a bundle of wires that are taped to another wiring harness under the dash. They are labeled, i had gone to the dealership for another reason. The mechanic there was kind enough to pull down the wires for me. There is also a procedure you have to do with the fuse box to engage it. I have found this procedure either on this forum or gmfullsize forum. Can't remember which.

Hope this helps

Eric